The easiest way I can come up with off the top of my head is rendering a 3d model for it. I'm sure there's a free model of a turbo laser out there somewhere...
I got some more ideas if you like
A landing pad (to be put on top of one base module)
A room with a stair or lift so you can put in a second level (or landing pad)
A cool super room that covers the whole module area, could be a breifing room, mess hall, training room or hangar.

If you'll keep pumping them out, I'll keep giving you my ideas!